Physical Processes That Shape The Coast
Akopọ
Stand on a beach and watch the waves. Some surge gently up the sand and leave it behind; others crash down and drag it back to sea. Those two kinds of wave, building and destroying, are the engine of every coastline. Add the energy of storms and the steady sideways nudge of longshore drift, and you have the forces that carve cliffs, build beaches and move sand for miles along the shore.
This lesson explains how the sea does its work. You will learn the difference between constructive and destructive waves, the four processes of coastal erosion, how material is transported and deposited, how wave refraction concentrates energy on headlands, and exactly how longshore drift moves sediment along a coast.
Awọn Afojusun
- Coastal erosion: hydraulic action, corrosion, corrasion, attrition; transportation; deposition; longshore drift.
- Types of waves: constructive and destructive and wave refraction.
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Oriire fun ipari ẹkọ lori Physical Processes That Shape The Coast. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- The distance of open water over which the wind blows is the: A. swash B. fetch C. backwash D. wavelength Answer: B
- Constructive waves are characterised by: A. strong backwash B. high energy C. strong swash and weak backwash D. short wavelength Answer: C
- Erosion by waves compressing air in cracks in a cliff is: A. corrasion B. attrition C. hydraulic action D. corrosion Answer: C
- Longshore drift moves material along a coast because: A. the backwash carries it up the beach B. the swash moves up at an angle and the backwash returns straight down C. tides pull it offshore D. rivers push it along Answer: B
- Wave refraction tends to concentrate erosion on: A. bays B. beaches C. headlands D. spits Answer: C
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